Linux & Server
How-To Guides
Step-by-step guides from certified engineers covering server setup, security hardening, performance tuning and troubleshooting — updated from 2016 to present.
How to Monitor GPU Server Performance on Linux
Monitor GPU server performance on Linux — track VRAM usage, GPU temperature, utilisation and power draw with nvidia-smi, Prometheus and Grafana.
How to Configure Varnish 7.5 with WordPress
Set up Varnish 7.5 with WordPress — new VCL features, improved stale-while-revalidate and debugging.
How to Set Up CloudPanel 2 on Ubuntu 24.04
Install CloudPanel 2 on Ubuntu 24.04 LTS — new UI, improved security and PHP 8.3/8.4 support.
How to Set Up OpenLiteSpeed on Ubuntu 24.04 LTS
Install OpenLiteSpeed on Ubuntu 24.04 LTS with PHP 8.4 LSAPI — the latest and fastest web server configuration for 2025 production deployments.
How to Install PHP 8.4 on Ubuntu Server
Install PHP 8.4 on Ubuntu — property hooks, lazy objects, new array functions and JIT improvements.
How to Deploy Ollama with Docker and Docker Compose
Deploy Ollama using Docker and Docker Compose — containerised AI model serving with GPU passthrough, persistent storage and automatic restart.
How to Harden SSL/TLS on Linux Servers in 2025
Modern SSL/TLS hardening for 2025 — TLS 1.3 only, strong ciphers, HSTS preload and OCSP stapling.
How to Fix SSH Connection Refused on Linux Server
Fix SSH connection refused errors on Linux — diagnose SSH service failures, firewall blocks, wrong ports, IP bans and recover access to locked-out servers.
How to Secure a Linux Server in 2024
Comprehensive Linux server security checklist for 2024 — SSH, firewall, Fail2Ban, auditing and monitoring.
How to Set Up a Multi-Cloud Backup Strategy for Linux Servers
Design and implement a multi-cloud backup strategy — distribute backups across providers to eliminate single points of failure.
How to Set Up a Hetzner Dedicated Server
Configure a Hetzner dedicated server from first boot — RAID, network, Ubuntu install and CloudPanel.
How to Configure PHP 8.3 OPcache JIT for Production
Configure PHP 8.3 OPcache JIT in tracing mode for maximum performance — buffer size and runtime tuning.
How to Monitor Websites with Prometheus Blackbox Exporter
Deploy Prometheus Blackbox Exporter to monitor website availability, SSL certificate expiry and HTTP response times from outside your server.
How to Set Up Ubuntu 24.04 Server from Scratch
Complete Ubuntu 24.04 LTS (Noble Numbat) server setup — systemd-networkd, nftables, and snap removal.
How to Set Up LocalAI on Linux Server
Install LocalAI on Linux — a drop-in OpenAI API replacement that runs models locally, making existing OpenAI-compatible apps work with self-hosted models.
How to Speed Up the WordPress Admin Dashboard
Fix a slow WordPress admin — identify plugin overhead, optimise the database, disable unused features and improve PHP memory allocation.
How to Fix Common Nginx Errors in 2024
Fix the most common Nginx errors in 2024 — 400, 403, 404, 413, 499, 502, 503, 504 and connection refused.
How to Set Up Zero Downtime Deployments on Linux
Implement zero downtime deployments using atomic symlinks, rsync and graceful Nginx reloads.
How to Configure Fail2Ban Advanced Rules in 2024
Advanced Fail2Ban configuration for 2024 — custom filters, multi-port banning and Cloudflare integration for edge-level protection.
How to Tune OpenLiteSpeed for High Traffic
Tune OpenLiteSpeed for high-traffic production servers — worker processes, connection limits, cache configuration and kernel parameters for maximum throughput.